<?php
namespace think;

CLASS jssdk{

  private $appId;
  private $appSecret;

  public function __construct($appId, $appSecret) {
    $this->appId = $appId;
    $this->appSecret = $appSecret;
  }

  public function getSignPackage() {
    $jsapiTicket = $this->getJsApiTicket();

    // 注意 URL 一定要动态获取，不能 hardcode.
    $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
    $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

    $timestamp = time();
    $nonceStr = $this->createNonceStr();

    // 这里参数的顺序要按照 key 值 ASCII 码升序排序
    $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

    $signature = sha1($string);

    $signPackage = array(
      "appId"     => $this->appId,
      "nonceStr"  => $nonceStr,
      "timestamp" => $timestamp,
      "url"       => $url,
      "signature" => $signature,
      "rawString" => $string
    );
    return $signPackage; 
  }

  private function createNonceStr($length = 16) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
  }

  private function getAccessToken() {
    // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
//    $data = json_decode($this->get_php_file("access_token.php"));
//    if ($data->expire_time < time()) {
//      // 如果是企业号用以下URL获取access_token
//      // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
//      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx0e64e7f20a99049b&secret=086b2fc843046dfcacd054261ed3eb51";
//      $res = json_decode($this->httpGet($url));
//      $access_token = $res->access_token;
//      if ($access_token) {
//        $data->expire_time = time() + 7000;
//        $data->access_token = $access_token;
//        $this->set_php_file("access_token.php", json_encode($data));
//      }
//    } else {
//      $access_token = $data->access_token;
//    }

//    $appid = 'wx0e64e7f20a99049b';
//    $appsecret =  '086b2fc843046dfcacd054261ed3eb51';
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appId."&secret=".$this->appSecret;
    //2初始化
    $ch = curl_init();
    //3.设置参数
    curl_setopt($ch , CURLOPT_URL, $url);
    curl_setopt($ch , CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    //4.调用接口
    $res = curl_exec($ch);
    //5.关闭curl
    curl_close( $ch );
    $arr = json_decode($res, true);
    dump($arr);
//    Cookie::set('access_token',$arr['access_token']);
    $access_token = $arr['access_token'];
    if(Session::get('accessToken') == null){
          return $access_token;
    }else{
      Session::set('access_token',$access_token);
    }
  }

  private function getJsApiTicket() {
    // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
//    $data = json_decode($this->get_php_file("jsapi_ticket.php"));
//    if ($data->expire_time < time()) {
//      $accessToken = $this->getAccessToken();
//      // 如果是企业号用以下 URL 获取 ticket
//      // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
//      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
//      $res = json_decode($this->httpGet($url));
//      $ticket = $res->ticket;
//      if ($ticket) {
//        $data->expire_time = time() + 7000;
//        $data->jsapi_ticket = $ticket;
//        $this->set_php_file("jsapi_ticket.php", json_encode($data));
//      }
//    } else {
//      $ticket = $data->jsapi_ticket;
//    }
    if(Session::get('accessToken') == null){
      $accessToken = $this->getAccessToken();
    }else{
      $accessToken = Session::get('accessToken');
    }
    $urll = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$accessToken."&type=jsapi";
    $access =  file_get_contents($urll);
    $result = json_decode($access, true);
    $ticket = $result['ticket'];
    return $ticket;
  }



//  private function httpGet($url) {
//    $curl = curl_init();
//    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
//    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
//    // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
//    // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
//    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
//    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
//    curl_setopt($curl, CURLOPT_URL, $url);
//
//    $res = curl_exec($curl);
//    curl_close($curl);
//
//    return $res;
//  }
//

}

